DS3231 AT24C32 IIC Precision Real Time Clock Memory Module for Arduino TE536

https://www.amazon.ca/XCSOURCE-AT24C32-Precision-Arduino-TE536/dp/B01IV3Z76E/ref=sr_1_33?m=A2ZMOMMJWP6V1W&marketplaceID=A2EUQ1WTGCTBG2&qid=1558654041&s=merchant-items&sr=1-33

•          DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, maintains accurate timekeeping even if disconnect the main power supply.
• RTC maintains seconds, minutes, hours, day, date, month, and year information. Less than 31 days of the month, the end date will be automatically adjusted, including corrections for leap year. The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format.
• Provides two configurable alarm clock and a calendar can be set to a square wave output. Address and data are transferred serially through an I2C bidirectional bus.
• IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V).
• Can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57.